Riot police had to use tear gas to keep the two sides apart and more than 100 people were injured.

The five activists named on Monday are Alaa Abdel Fattah, Ahmed Douma, Karim El-Shaer, Hazem Abdel-Azim and Ahmed Ghoneimi.

Correspondents describe Alaa Abdel Fattah as a leading blogger who played a role in the protests that led to the overthrow of President Hosni Mubarak in 2011.

A statement from the prosecutor's office said they were accused of inciting "aggression against people, the destruction of property and disturbing civil peace in the events that erupted during the protest in front of the Muslim Brotherhood's headquarters".

The Brotherhood has already filed a legal complaint against 169 people, including party leaders, whom it accused of involvement in the violence.

Egypt's secular opposition accuses President Morsi of seeking to usurp power - a charge he denies.